I’ve noticed when I go to the main discourse page, I see the newer posts at the top, but I no longer see which posts have unread comments for the most part. I’ll see a “new” tag for posts I’ve never read, but I no longer see when posts have new comments like I used to. Did I change something?

I don’t ever have to explicitly mark “tracking” to track a thread. I do have to have viewed it within a certain time frame (in x days or something) and I do have to have spent more than a split second viewing it, but it automatically tracks it for me if I do those things.

Open a new post that you haven’t created, scroll to the bottom, and wait for about 10 seconds. If you scroll all the way to the very bottom quickly enough there is a message, “There are x unread and y new topics remaining…”, and you can see the unread count drop by one. Then scroll back up and see if the notifications drop-down (just above "Suggested Topics) is blue “Tracking”.

Also. First time you do this, you will see every post since this site was set up. Take the time to scroll all the way to the bottom and hit the button to dismiss all as read. From here on out, all conversations will be popping up the blue icons.